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23 lines
566 B
HTML
23 lines
566 B
HTML
<p>Write a program to swap odd and even bits in an integer with as few instructions as possible (e.g., bit 0 and bit 1 are swapped, bit 2 and bit 3 are swapped, and so on).</p>
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<p><strong>Example1:</strong></p>
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<pre>
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<strong> Input</strong>: num = 2（0b10）
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<strong> Output</strong> 1 (0b01)
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</pre>
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<p><strong>Example2:</strong></p>
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<pre>
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<strong> Input</strong>: num = 3
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<strong> Output</strong>: 3
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</pre>
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<p><strong>Note:</strong></p>
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<ol>
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<li><code>0 <= num <=</code> 2^30 - 1</li>
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<li>The result integer fits into 32-bit integer.</li>
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</ol>
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